![]() ![]() Insufficient GPIOs: they call it “16-bit console” for some reason, indeed the CPU latches or outputs 16 bits of data at a time thus you’ll need 16 pins just for the data part. ![]() To make matters worse, the buses of the motherboard are built in a parallel fashion which takes us to the third idea. So what this means is that the microcontroller would have to react to the change in the address lines 2 or 4 times faster than the SNES CPU itself. Timing: this is the most crucial part, because ROM chips usually output the data bits as soon as the address lines are set and depending of the CPU’s efficiency per cycle, it latches the data bits either in a second clock pulse or one of the edges of the first one (after setting the address bus).Storage capacity: while some games (as raw data) can fit into the built-in storage of some microcontrollers, others are too much. ![]()
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